the photo above is the warehouse, you can see the small lift in the far right which means the main part of the picture is of what was left of the upstairs winestore and the racking between. Mill Hill store had opened on the previous Thursday and Finchley (it's closest store) and some of Finchley's Partners were working at Mill Hill to help out with the opening, over the next few weeks Partners helped out at stores in the vicinity, Whetstone, Brent Cross and others. When Finchley was safe enough to go into the Partners went back and helped clean up and restock, even though building was still going on in the branch.

it was one of the biggest fires in London, I believe second only to Alexandra Palace burning a few years previously and was not under control until late in the afternoon.